This frameless BLDC motor belongs to our BOT series of frameless motors. The BOT series is specifically designed for humanoid and legged robots, with industry-leading torque and lighter weight. It excels dynamic response, precise control, torque ripple, efficiency, temperature, and noise.
Performance Data
| Rated Power (W) | 300 | Maximum Mechanical Speed (rpm) | 1,500 |
| Rated Voltage (V) | 48 | No-Load Speed (rpm) | 1,320 |
| Rated Torque Temperature Rise 55℃ (Nm) | 3.12 | Torque/Weight Ratio (Nm/kg） | 50.4 |
| Rated Torque Temperature Rise 105℃ (Nm) | 4.79 | Back EMF Constant (Vp/rpm) | 0.0368 |
| Rated Current Temperature Rise =55℃ (A) | 8 | Motor Constant (Nm/√W) | 0.478 |
| Rated Current Temperature Rise =105℃ (A) | 12 | Phase Resistance (mΩ) | 0.166 |
| Peak Torque 2S Stall (Nm) | 21.66 | Phase Inductance (mH) | 0.069 |
| Peak Torque 10S Stall (Nm) | 20.69 | Number Of Pole Pairs | 20 |
| Peak Current 2S Stall (A) | 63 | Weight (g) | 430 |
| Peak Current 10S Stall (A) | 60 | Maximum Winding Temperature (℃) | 130 |
| Rated Speed (rpm) | 1,200 | Operating Environment Temperature (℃) | -20 to 50 |
Mounting Dimension
| Stator Outer Diameter D/(mm) | 115.0 |
| Rotor Inner Diameter d/(mm) | 89.5 |
| Rotor Length I/(mm) | 13.5 |
| Stator Lam Length L’/(mm) | 13.5 |
| Stator Length L/(mm) | 25.0 |
| PCB Diameter G/(mm) | 14 |
| Winding Head Diameter g/(mm) | 113.0 |
More Frameless BLDC Motors for Selection
We are designing and developing a wider range of BOT series motors in various sizes, suitable for more parts of humanoid and legged robots. If you have any customization needs, please contact us.
In addition, we also offer frameless BLDC motors below, suitable for applications in robotics, aerospace, medical, and other fields. They also feature outstanding performance.
Performance data
Our motors are compatible with the following voltages: 12V, 24V, 36V, 48V. If you have specific requirements or need additional data, please feel free to contact us.
| Model | FM 2506 | FM 2510 | FM 3808 | FM 3816 | FM 5010 | FM 5016 | FM 7013 | FM 7021 | FM 8507 | FM 8516 | FM 8525 | FM 8527 | FM 11527 | BOT FM 11513 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Power (W) | 70 | 52 | 95 | 205 | 195 | 183 | 235 | 260 | 405 | 420 | 415 | 425 | 750 | 272 |
| Rated Voltage (V) | 24 | 24 | 24 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 48 |
| Rated Torque (Nm) | 0.032 | 0.048 | 0.10 | 0.23 | 0.30 | 0.50 | 0.67 | 1.25 | 0.44 | 1.44 | 2.33 | 2.67 | 5.50 | 2.60 |
| Peak Torque (Nm) | 0.100 | 0.200 | 0.40 | 0.76 | 1.00 | 1.40 | 2.18 | 4.00 | 1.20 | 4.55 | 7.40 | 8.45 | 12.50 | 21.66 |
| Rated Speed (rpm) | 20,650 | 10,300 | 9,000 | 8,500 | 6,200 | 3,500 | 3,400 | 2,000 | 9,000 | 2,800 | 1,700 | 1,500 | 1,300 | 1,000 |
| Motor Constant (Nm/√W) | 0.014 | 0.020 | 0.036 | 0.060 | 0.084 | 0.098 | 0.152 | 0.233 | 0.110 | 0.280 | 0.443 | 0.480 | 0.760 | 0.555 |
| Rotor Inertia (kgcm2) | 0.0017 | 0.0026 | 0.0110 | 0.023 | 0.062 | 0.100 | 0.231 | 0.370 | 0.328 | 0.724 | 1.16 | 1.25 | 4.32 | 1.96 |
| Torque Ripple @ Rated Current | 2.45% | 2.93% | 4.62% | 4.26% | 3.17% | 3.35% | 2.43% | 2.24% | 4.76% | 3.26% | 3.14% | 2.83% | 2.88% | 3.30% |
| Torque Ripple @ Peak Current | 1.74% | 2.01% | 1.78% | 1.78% | 2.16% | 2.58% | 2.40% | 2.21% | 3.06% | 2.59% | 2.64% | 2.64% | 2.24% | 2.41% |
| Max Efficiency (%) | 88 | 85 | 88 | 88 | 89 | 88 | 90 | 90 | 92 | 91 | 91 | 91 | 93 | 93 |
| Detailed Specs | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> | Learn More> |
Size
| Model | FM 2506 | FM 2510 | FM 3808 | FM 3816 | FM 5010 | FM 5016 | FM 7013 | FM 7021 | FM 8507 | FM 8516 | FM 8525 | FM 8527 | FM 11527 | BOT FM 11513 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Outer Diameter D / (mm) | 25.0 | 25.0 | 38.0 | 38.0 | 50.0 | 50.0 | 70.0 | 70.0 | 85.0 | 85.0 | 85.0 | 85.0 | 115.0 | 115.0 |
| Inner Diameter d / (mm) | 11.6 | 11.6 | 18.0 | 18.0 | 30.0 | 30.0 | 42.0 | 42.0 | 52.0 | 52.0 | 52.0 | 52.0 | 74.0 | 89.5 |
| Stator Length L / (mm) | 11.3 | 15.2 | 12.5 | 19.0 | 13.0 | 20.0 | 17.5 | 28.0 | 13.0 | 26.0 | 38.0 | 41.6 | 40.0 | 25.0 |
| Weight / (g) | 16 | 24 | 55 | 82 | 83 | 135 | 200 | 320 | 192 | 370 | 545 | 670 | 1,050 | 430 |
Design for rapid dynamic response and precise control
We have previously designed motors for aircraft starter-generator and electric vehicles, with advanced design and craftsmanship. We are now applying these technologies to our frameless motors, ensuring they deliver industry-leading performance.
- Unique Flat Wire Winding:
- High fill factor, low copper loss, better cooling, minimal air gaps, and increased stability.
- Ensures consistent winding for smooth operation and precise control.
- Tiny and Thin Stator Laminations:
- Reduces eddy current and hysteresis losses for better efficiency.
- Boosts dynamic performance and precise high-frequency control.
- Generates less heat, reducing vibration and noise.
- Increases strength and stability.
- Halbach Electromagnetic Design:
- Provides stronger torque, lighter weight, and smoother operation.
- Low Cogging Design:
- Reduces cogging torque for smoother output.
- Decreases vibration and noise.
Features
Our frameless motors exceptional in the following advantages:
- High Torque Density
- Low Torque Ripple
- High Dynamic Response
- High Precision: Compatible with 32-bit encoders, as a frameless servo motor. Of course, Hall sensors are also optional.
- Enhanced Thermal Management: Low heat generation and better heat dissipation.
- Compact & Light: Larger hollow bore and lighter weight.
- Efficient: Higher efficiency brings better heat dissipation, lower energy consumption.
- Adaptable to Harsh Environments: Insulation class F- H. Can operate stably within a motor temperature range of -40°C to 155°C, and in ambient temperatures from -40°C to 80°C.